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| Windows
9x Services |
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I know what your thinking. Windows 9x does not have
services!? Well, not like what NT has but it does have the
ability to run processes that are invisible to the user. Why would
you even be supporting 9x? Well there are still millions of them
out there and say for example we need to run a non-gui
application before the user logs onto their system. Ok so here
is the code with comments.
void Win9xService(void)
{
/* Detach from your current
visible console if not using WinMain */
FreeConsole();
/* Get a handle to kernel32 */
HINSTANCE hKernel = LoadLibrary("KERNEL32.DLL");
if (hKernel == NULL)
{
return;
}
/*
Get a function pointer to RegisterServiceProcess
function within kernel32
*/
FARPROC lpfn = GetProcAddress(hKernel, "RegisterServiceProcess");
/* Define the function
(RegisterServiceProcess) in the dll for reuse */
typedef DWORD (WINAPI *
pICFUNC)(DWORD , DWORD );
pICFUNC fpRegisterServiceProcess;
/* Instantiate an instance */
fpRegisterServiceProcess = pICFUNC(lpfn);
/*
Now use the function pointer we have to register our
process as a service
*/
if
(fpRegisterServiceProcess(GetCurrentProcessId(), 1) == 1)
{
return;
}
/* Free the kernel library */
FreeLibrary(hKernel);
return;
}
Now when you execute this function your console will disappear
or if running from the command line you will return. But in
order to run before the user logs in you need to edit a Registry
key. Add a string type Subkey under:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
and make the string value the path to your executable. Your all
set! |
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